Wi-Fi(delity) in a Smaller Sonos

High-Quality Sound in a Downsized Speaker

By

Walter S. Mossberg

Updated Nov. 19, 2013 9:04 p.m. ET

In the market for high-quality wireless speakers that stream music digitally, Sonos has been a gold standard. Its products produce sterling sound, need no wiring or professional installation and are controlled by apps on computers, tablets and smartphones. They can be used alone, or several can be networked together to form a whole-house system.

But Sonos products have been relatively expensive, ranging between $300 and $700 for a single speaker, plus $50 for a "bridge" device that plugs into your home Internet...